/* Responsive storefront layers: Mobile <= 734, Tablet 735-1068, Desktop >= 1069. */

html { max-width: 100%; overflow-x: clip; }
body { min-width: 320px; max-width: 100%; -webkit-text-size-adjust: 100%; }
main, section, header, footer, nav, .shell { min-width: 0; }
button, input, select, textarea { max-width: 100%; }
button, select, input { touch-action: manipulation; }
.statusbar button { min-height: 32px; }
.color-btn { width: 44px; height: 44px; }
.filter-reset { min-height: 40px; }
.cart-drawer:not(.open), .mobile-menu:not(.open) { visibility: hidden; }
.cart-drawer.open, .mobile-menu.open { visibility: visible; }
.search-sheet { top: 0; max-height: 100svh; }
.mobile-filter-toggle { display: none; }

/* Mobile */
@media (max-width: 734px) {
  :root { --header: 60px; }
  .shell { width: 100%; max-width: none; padding-inline: max(16px, env(safe-area-inset-left)) max(16px, env(safe-area-inset-right)); }
  .btn { min-height: 44px; padding-inline: 18px; }
  .icon-btn { width: 44px; height: 44px; }
  .option-btn { min-height: 48px; }
  .display-title { font-size: 42px; line-height: 1; }
  .page-title { font-size: 38px; line-height: 1.02; }
  .section-title { font-size: 32px; line-height: 1.06; }
  .lede { font-size: 17px; line-height: 1.5; }

  .statusbar { min-height: 40px; padding-top: env(safe-area-inset-top); font-size: 9px; }
  .statusbar__inner { min-height: 40px; padding-inline: 12px; text-align: center; line-height: 1.3; }
  .statusbar button { display: none; }
  .site-header { height: var(--header); }
  .header-inner { height: 100%; grid-template-columns: minmax(88px, 1fr) auto; padding-left: max(12px, env(safe-area-inset-left)); padding-right: max(8px, env(safe-area-inset-right)); }
  .wordmark { width: 104px; height: 44px; }
  .main-nav, .compare-header { display: none; }
  .header-actions { gap: 0; }
  .header-actions .icon-btn { width: 40px; height: 44px; }
  .menu-toggle { display: inline-grid; }
  .mobile-menu { top: calc(var(--header) + env(safe-area-inset-top)); display: flex; padding: 18px max(24px, env(safe-area-inset-right)) calc(24px + env(safe-area-inset-bottom)) max(24px, env(safe-area-inset-left)); }
  .mobile-menu__links button { min-height: 54px; font-size: 18px; }
  .mobile-menu__utility { flex-wrap: wrap; }
  .mobile-menu__utility button { min-height: 46px; }

  .home-hero { height: min(680px, calc(100svh - var(--header))); min-height: 610px; }
  .home-hero__copy { padding-top: 44px; }
  .home-hero .display-title { font-size: 42px; }
  .home-hero .lede { max-width: 340px; margin: 9px auto 18px; font-size: 18px; }
  .home-hero .actions { gap: 9px; }
  .home-hero .btn { min-height: 44px; padding-inline: 20px; font-size: 15px; }
  .home-hero--iphone > img { width: max(660px, 174%); max-width: none; }

  .campaign-panel { min-height: 560px; padding: 43px 18px 0; }
  .campaign-panel h2 { font-size: 36px; }
  .campaign-panel__subtitle { font-size: 19px; }
  .campaign-panel .actions { gap: 8px; margin-top: 15px; }
  .campaign-panel > img, .campaign-panel--macbook-air > img { width: 138%; max-width: none; height: 330px; object-fit: contain; }
  .home-promo-grid { grid-template-columns: 1fr; gap: 10px; padding: 10px; }
  .home-promo-tile { min-height: 520px; padding: 40px 18px 0; }
  .home-promo-tile h3 { font-size: 34px; }
  .home-promo-tile p { max-width: 360px; font-size: 17px; }
  .home-promo-tile > img { height: 335px; object-fit: contain; }
  .trade-in-panel { min-height: 530px; padding: 40px 18px 0; }
  .trade-in-panel h2 { font-size: 34px; }
  .trade-in-panel p { max-width: 350px; font-size: 17px; }
  .trade-in-panel > img { width: 720px; max-width: none; }

  .content-section { padding: 68px 0; }
  .section-head { align-items: flex-start; flex-direction: column; gap: 14px; margin-bottom: 28px; }
  .section-head p { font-size: 14px; }
  .category-rail { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .home-product-grid { grid-template-columns: 1fr; }
  .home-product-panel { min-height: 480px; padding: 34px 20px; }
  .home-product-panel h3 { font-size: 34px; }
  .home-product-panel > img { width: 100%; right: 0; }
  .trust-grid, .support-grid { grid-template-columns: 1fr; }
  .trust-item { min-height: 88px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }

  .store-overview { padding: 46px 0 27px; }
  .store-overview h1 { margin-bottom: 29px; font-size: 40px; }
  .store-category-rail { grid-auto-columns: 96px; gap: 12px; }
  .store-category-item__image { width: 92px; height: 78px; }
  .store-category-item strong { font-size: 12px; }
  .store-lineup { padding: 64px 0 74px; }
  .store-lineup__head { align-items: flex-start; flex-direction: column; gap: 14px; margin-bottom: 28px; }
  .store-lineup__head h2 { font-size: 32px; }
  .store-lineup__track { width: 100%; grid-auto-columns: min(82vw, 340px); gap: 12px; padding-inline: 16px; scroll-padding-inline: 16px; }
  .store-lineup-card { min-height: 552px; }
  .store-lineup-card__media { height: 345px; }
  .store-lineup-card h3 { font-size: 25px; }
  .store-catalog-link { padding: 60px 0; }
  .store-catalog-link > .shell { align-items: flex-start; flex-direction: column; }
  .store-catalog-link h2 { font-size: 32px; }
  .store-catalog-actions { width: 100%; flex-direction: column; }
  .store-catalog-actions .btn { width: 100%; flex: none; }

  .store-hero { padding: 48px 0 28px; }
  .store-hero__inner { align-items: flex-start; flex-direction: column; gap: 14px; }
  .store-hero p { font-size: 14px; }
  .store-shell { padding: 28px 0 72px; }
  .catalog-toolbar { display: grid; grid-template-columns: 1fr; gap: 12px; margin-bottom: 12px; }
  .sort-select { width: 100%; max-width: none; min-height: 46px; }
  .mobile-filter-toggle { width: 100%; min-height: 48px; display: flex; align-items: center; justify-content: space-between; padding: 0 14px; border: 1px solid #cfd3d9; background: #fff; font-size: 14px; font-weight: 650; }
  .mobile-filter-toggle span { display: inline-flex; align-items: center; gap: 9px; }
  .mobile-filter-toggle svg { width: 18px; height: 18px; }
  .mobile-filter-toggle.open { border-color: var(--blue); color: var(--blue); }
  .catalog-layout { display: block; }
  .filter-panel { display: none; position: static; margin-top: 10px; padding: 14px; border: 1px solid var(--line); background: #fafbfc; }
  .filter-panel.open { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .filter-panel .filter-group { padding: 0; border: 0; }
  .filter-panel .filter-reset { grid-column: 1 / -1; min-height: 44px; margin: 2px 0 0; text-align: left; }
  .filter-group select { min-height: 44px; font-size: 13px; }
  .catalog-grid { grid-template-columns: 1fr; gap: 16px; margin-top: 18px; }
  .catalog-grid .product-card { min-height: 470px; }
  .product-card h3 { min-height: 0; font-size: 23px; }
  .product-card__media, .catalog-grid .product-card__media { height: clamp(240px, 68vw, 290px); }
  .product-card__actions .btn { min-width: 0; }

  .breadcrumb { min-height: 46px; overflow-x: auto; white-space: nowrap; scrollbar-width: none; }
  .breadcrumb::-webkit-scrollbar, .detail-tabs::-webkit-scrollbar, .store-category-rail::-webkit-scrollbar { display: none; }
  .product-top { min-height: 0; grid-template-columns: 1fr; }
  .product-gallery { width: 100%; min-height: 0; aspect-ratio: 1 / 1; position: relative; top: auto; }
  .product-gallery img { max-height: 100%; }
  .product-gallery .iphone-color-focus img { height: 106%; }
  .gallery-note { left: 12px; bottom: 12px; max-width: calc(100% - 24px); font-size: 9px; }
  .product-config { padding: 32px 16px 42px; border-top: 1px solid var(--line); border-left: 0; }
  .product-config h1 { font-size: 34px; line-height: 1.08; overflow-wrap: anywhere; }
  .product-config__desc { margin: 16px 0 20px; font-size: 14px; line-height: 1.55; }
  .option-group { margin-top: 24px; }
  .option-group__head { align-items: flex-start; gap: 12px; }
  .option-group__head span { max-width: 48%; text-align: right; line-height: 1.35; }
  .color-btn { width: 42px; height: 42px; }
  .config-actions { grid-template-columns: 1fr; }
  .config-actions .btn { width: 100%; min-height: 50px; }
  .product-content { padding-top: 48px; }
  .detail-tabs { gap: 20px; }
  .detail-tabs a { min-height: 44px; display: inline-flex; align-items: center; padding-bottom: 0; }
  .detail-section { padding: 48px 0; }
  .detail-grid { grid-template-columns: 1fr; gap: 24px; }
  .detail-grid h2 { font-size: 28px; }
  .spec-row { grid-template-columns: 1fr; gap: 6px; padding: 13px 0; }
  .related-grid { grid-template-columns: 1fr; }

  .support-hero { padding: 70px 0; }
  .support-card { min-height: 250px; }
  .contact-panel { grid-template-columns: 1fr; gap: 28px; padding: 42px 0; }
  .contact-panel__intro h2 { font-size: 30px; }
  .contact-options { grid-template-columns: 1fr; }
  .contact-option { min-height: 88px; padding: 16px; }
  .legal-panel { grid-template-columns: 1fr; gap: 32px; padding: 34px 20px; }
  .legal-seal { max-width: 260px; margin-inline: auto; }
  .legal-copy h2 { font-size: 30px; }

  .search-sheet { top: 0; max-height: 100svh; }
  .search-sheet__top { min-height: 74px; gap: 10px; }
  .search-sheet input { font-size: 17px; }
  .search-results { grid-template-columns: 1fr; }
  .search-result { grid-template-columns: 68px minmax(0, 1fr) 36px; gap: 10px; }
  .search-result img { width: 68px; height: 68px; }
  .cart-drawer { width: 100%; padding-bottom: env(safe-area-inset-bottom); }
  .drawer-head { min-height: 88px; padding: 18px; }
  .drawer-head h2 { font-size: 28px; }
  .cart-items, .drawer-head, .cart-summary { padding-inline: 16px; }
  .cart-item { grid-template-columns: 72px minmax(0, 1fr) 40px; gap: 10px; }
  .cart-item img { width: 72px; height: 72px; }
  .quantity button { width: 36px; height: 36px; }
  .compare-tray { min-width: 0; width: calc(100% - 24px); bottom: 12px; gap: 12px; padding-left: 14px; }

  .site-footer { padding-top: 52px; }
  .footer-top { align-items: flex-start; flex-direction: column; gap: 18px; }
  .footer-top p { text-align: left; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 20px; padding: 36px 0; }
  .footer-grid button, .footer-grid span, .footer-grid a { min-height: 32px; display: flex; align-items: center; font-size: 12px; }
  .footer-bottom { flex-direction: column; gap: 12px; padding-bottom: calc(10px + env(safe-area-inset-bottom)); }
}

@media (max-width: 370px) {
  .wordmark { width: 94px; }
  .header-actions .icon-btn { width: 38px; }
  .display-title, .home-hero .display-title { font-size: 39px; }
  .page-title { font-size: 34px; }
  .section-title, .store-lineup__head h2 { font-size: 29px; }
  .product-config h1 { font-size: 32px; }
  .filter-panel.open, .option-list { grid-template-columns: 1fr; }
  .filter-panel .filter-reset { grid-column: 1; }
  .cart-item { grid-template-columns: 64px minmax(0, 1fr) 38px; }
  .cart-item img { width: 64px; height: 68px; }
}

/* Tablet and iPad */
@media (min-width: 735px) and (max-width: 1068px) {
  :root { --header: 64px; }
  .shell { width: 100%; max-width: none; padding-inline: clamp(32px, 4.5vw, 48px); }
  .btn, .option-btn { min-height: 46px; }
  .display-title { font-size: 56px; }
  .page-title { font-size: 50px; }
  .section-title { font-size: 42px; }
  .lede { font-size: 19px; }
  .header-inner { grid-template-columns: minmax(120px, 1fr) auto; }
  .main-nav, .compare-header { display: none; }
  .menu-toggle { display: inline-grid; }
  .mobile-menu { top: var(--header); display: flex; padding: 30px clamp(40px, 7vw, 72px); }
  .mobile-menu__links button { min-height: 60px; font-size: 21px; }

  .home-hero { height: clamp(680px, calc(100svh - var(--header)), 770px); }
  .home-hero__copy { padding-top: 52px; }
  .home-hero .display-title { font-size: 54px; }
  .home-hero .lede { font-size: 24px; }
  .home-hero--iphone > img { width: min(1080px, 122%); }
  .campaign-panel { min-height: 640px; }
  .campaign-panel h2 { font-size: 48px; }
  .campaign-panel__subtitle { font-size: 24px; }
  .campaign-panel > img { width: 104%; }
  .campaign-panel--macbook-air > img { width: 110%; }
  .home-promo-grid { gap: 10px; padding: 10px; }
  .home-promo-tile { min-height: 540px; padding-inline: 18px; }
  .home-promo-tile h3 { font-size: 38px; }
  .home-promo-tile p { font-size: 18px; }
  .home-promo-tile > img { height: 350px; object-fit: contain; }

  .content-section { padding: 88px 0; }
  .category-rail { grid-template-columns: repeat(3, 1fr); }
  .support-grid { grid-template-columns: repeat(2, 1fr); }
  .store-overview h1 { font-size: 52px; }
  .store-lineup__track { width: 100%; grid-auto-columns: 320px; padding-inline: clamp(32px, 4.5vw, 48px); scroll-padding-inline: clamp(32px, 4.5vw, 48px); }

  .store-hero { padding: 62px 0 38px; }
  .store-hero__inner { align-items: flex-start; gap: 32px; }
  .store-shell { padding-top: 34px; }
  .catalog-toolbar { margin-bottom: 18px; }
  .catalog-layout { grid-template-columns: 1fr; gap: 22px; }
  .filter-panel { position: static; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; border: 0; }
  .filter-panel .filter-group { padding: 0; border: 0; }
  .filter-panel .filter-reset { min-height: 46px; margin: 22px 0 0; }
  .catalog-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  .catalog-grid .product-card { min-height: 490px; }
  .catalog-grid .product-card__media { height: clamp(250px, 34vw, 320px); }

  .product-top { grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr); min-height: 610px; }
  .product-gallery { min-height: clamp(520px, 72svh, 650px); position: sticky; top: var(--header); }
  .product-gallery img { max-height: 650px; }
  .product-gallery .iphone-color-focus img { height: 108%; }
  .product-config { padding: 38px 28px 48px; border-top: 0; border-left: 1px solid var(--line); }
  .product-config h1 { font-size: 40px; }
  .product-config__desc { font-size: 14px; }
  .option-group { margin-top: 24px; }
  .option-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .config-actions { grid-template-columns: 1fr; }
  .product-content { padding-top: 68px; }
  .detail-tabs a { min-height: 44px; display: inline-flex; align-items: center; padding-bottom: 0; }
  .detail-section { padding: 60px 0; }
  .detail-grid { grid-template-columns: 1fr; gap: 30px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-panel { grid-template-columns: 1fr; gap: 32px; }
  .legal-panel { grid-template-columns: 1fr; gap: 36px; padding: 44px; }
  .legal-seal { width: 260px; margin-inline: auto; }

  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 34px 48px; }
  .footer-grid button, .footer-grid span, .footer-grid a { min-height: 30px; display: flex; align-items: center; }
}

/* Desktop, notebooks and large monitors */
@media (min-width: 1069px) {
  .shell { width: 100%; max-width: 1280px; padding-inline: 40px; }
  .main-nav { display: flex; }
  .menu-toggle { display: none; }
  .mobile-menu { display: none; }
  .compare-header { display: inline-grid; }
  .home-hero .display-title { font-size: 56px; }
  .home-hero { height: clamp(650px, calc(100svh - var(--header)), 790px); }
  .catalog-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .product-top { grid-template-columns: minmax(0, 1.15fr) minmax(390px, .85fr); }
}

@media (min-width: 1440px) {
  .catalog-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1920px) {
  .home-hero { max-height: 800px; }
  .campaign-panel { min-height: 700px; }
  .home-promo-grid { max-width: 1920px; margin-inline: auto; }
}

/* Admin remains usable on tablets and phones. */
@media (max-width: 900px) {
  .admin-topbar { height: 62px; padding: 0 14px; }
  .admin-brand span { display: none; }
  .admin-topbar__actions .btn { width: 42px; min-width: 42px; padding: 0; font-size: 0; }
  .admin-topbar__actions .btn svg { margin: 0; }
  .admin-layout { display: block; min-height: calc(100vh - 62px); }
  .admin-sidebar { position: sticky; z-index: 30; top: 62px; width: 100%; height: auto; display: block; padding: 7px 10px; border-right: 0; border-bottom: 1px solid #dedfe3; overflow-x: auto; }
  .admin-sidebar nav { display: flex; min-width: max-content; gap: 5px; }
  .admin-sidebar nav button { min-height: 40px; padding-inline: 12px; }
  .admin-sidebar nav button span { display: inline; }
  .admin-local-note { display: none; }
  .admin-main { padding: 28px 16px 70px; }
  .admin-page-head { min-height: 0; margin-bottom: 22px; }
  .admin-page-head h1 { font-size: 28px; }
  .admin-toolbar { grid-template-columns: 1fr 170px; }
  .admin-toolbar .btn { grid-column: 1 / -1; }
  .admin-product-row { grid-template-columns: 66px minmax(0, 1fr) 82px; gap: 12px; }
  .admin-product-row__media { width: 62px; height: 62px; }
  .admin-product-row__price, .admin-product-row__status { display: none; }
  .admin-product-row__actions { gap: 2px; }
  .admin-form-grid { grid-template-columns: 1fr; }
  .admin-field--wide { grid-column: 1; }
  .admin-main-image { grid-template-columns: 180px 1fr; }
  .admin-main-image__preview { width: 180px; height: 170px; }
  .admin-backup-grid { grid-template-columns: 1fr; }
  .admin-backup-grid__wide { grid-column: 1; }
  .admin-inline-form { grid-template-columns: 1fr 1fr; }
  .admin-inline-form .btn { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .admin-brand img { width: 72px; }
  .admin-sidebar nav button { font-size: 12px; }
  .admin-sidebar nav button svg { width: 16px; }
  .admin-nav-count { min-width: 18px; height: 18px; }
  .admin-main { padding-inline: 10px; }
  .admin-toolbar { grid-template-columns: 1fr; }
  .admin-toolbar .btn { grid-column: 1; width: 100%; }
  .admin-product-row { min-height: 86px; grid-template-columns: 58px minmax(0, 1fr) 76px; padding: 10px; }
  .admin-product-row__media { width: 56px; height: 56px; }
  .admin-product-row__identity strong { font-size: 13px; }
  .admin-product-row__actions .icon-btn { width: 36px; height: 36px; }
  .admin-editor-section { padding: 20px 15px; }
  .admin-simple-bar { align-items: stretch; flex-direction: column; }
  .admin-simple-bar .btn { width: 100%; }
  .admin-main-image { grid-template-columns: 1fr; }
  .admin-main-image__preview { width: 100%; height: 230px; }
  .admin-variant-row { grid-template-columns: 1fr; gap: 10px; }
  .admin-color-image { grid-template-columns: 70px 1fr; padding: 10px; }
  .admin-color-image__preview { width: 70px; height: 70px; }
  .admin-editor-actions { bottom: 8px; }
  .admin-editor-actions .btn { flex: 1; padding-inline: 10px; }
  .admin-auth { padding: 12px; }
  .admin-auth__panel { padding: 28px 20px; }
  .admin-auth__panel h1 { font-size: 25px; }
  .admin-inline-form { grid-template-columns: 1fr; }
  .admin-inline-form .btn { grid-column: 1; }
  .admin-reset-zone { align-items: flex-start; flex-direction: column; }
  .admin-reset-zone .btn { width: 100%; }
  .admin-order > header { align-items: flex-start; flex-direction: column; padding: 16px; }
  .admin-order__controls { width: 100%; }
  .admin-order__controls { flex-wrap: wrap; }
  .admin-order__accept, .admin-order__ready, .admin-order__accepted { width: 100%; justify-content: center; }
  .admin-order__controls select { flex: 1; min-width: 0; }
  .admin-order__customer { grid-template-columns: 1fr; }
  .admin-order__customer > * { min-height: 64px; padding-inline: 16px; }
  .admin-order__customer > * + * { border-top: 1px solid #ececef; border-left: 0; }
  .admin-order__items { padding-inline: 16px; }
  .admin-order-item { grid-template-columns: 50px minmax(0, 1fr); }
  .admin-order-item img { width: 50px; height: 50px; }
  .admin-order-item > b { grid-column: 2; }
}